In a triangle, we use terms like adjacent and opposite. These refer to sides in relation to angles. In our musical triangle, the drummer is at one angle in the back. This side, where the audience is, is called the opposite side.
Trunc is database function, try using round for numeric values, or change the Processing of Query to database.
1 The coccyx also functions to support and stabilize a person while he or she is in a sitting position. (Healthline.com).  2 Function of coccyx: It is believed that the coccyx is remnant of vestigial tail. 3  But it is not useless in the body. 4  It provides attachment to various important muscles, ligaments, and tendons.